Roughing machine



Nov. 26, 1940. c. G. BROSTROM 2,222,758

ROUGHING MACHINE Filed March 50, 1938 4 Sheets-Sheet l NOV. 26, 1940. Q BRQSTRQM 2,222,758

ROUGHING MACHINE Filed March 30, 1938 4 Sheets-Sheet 2 Nov. 26, 1940.

c. G. BROSTROM 2,222,758

ROUGHING MACHINE Filed March 50, 1958 4 Sheets-Sheet 3 ma w 5 t Nov. 26, 1940.

-c. G. BROSTROM 2,222,758

ROUGHING MACHINE Filed March 30, 1938 4 Sheets-Sheet 4 Patented Nov. 26, 1940 UNITED STATES PATENT OFFICE ROUGHIN G MACHINE Jersey Application March 30,

8 Claims.

This invention relates to roughing machines and is herein illustrated as embodied in a machine for roughing channels and channel lips formed in shoe sole-s.

It is an object of the invention to provide a channel roughing machine of simple construction which will operate easily and effectively upon both the base and lip of a channel with a minimum of preliminary preparation of the channeled sole.

With channel roughing machines heretofore in use it has been necessary to raise and turn back the lip of the channel before presenting the sole to the machine. One of the features of the present invention consists in the provision of means for opening the channel in ad- Vance of the roughing tool so that no preliminary lip raising operation is necessary and a shoe may be operated upon immediately after the sole has been laid. As shown herein, the

channel opening means may consist of a plow adapted to enter beneath the channel lip and arranged to oscillate transversely of the channel, preferabiy about its point or free end as a 2.3 center.

In accordance with another feature of the invention the channel opening means is so mounted and retained as to permit it to be moved instantly into or away from operating relation to the roughing tool in order to adapt the machine ior operation upon either soles the channel lips of which have previously been raised or those of which the lips have not been raised.

A further feature of the invention consists in the provision of an improved roughing tool, preferably a vire brush, having the form of a pointed cone adapted to be received within a sole channel and to the channel base and the inner surface of the lip simultaneously. All parts of the periphery of such a tool can operate upon both the base and the lip when the .lip is properly supported, and the vertical angle of the cone be acute, so that it is not necessary to bend the lip back in order to operate effectively upon it.

These and c .o-r features of the invention, including certain. details of construction and combinations of parts, will now be described in greater detail in connection. with the accompanying drawings, in which 1 is a view, in front elevation, of a machine embodying the invention;

Fig. 2 is a view, in side elevation, of the upper portion of the machine;

Fig. 3 is a View, in side elevation, showing 1938, Serial No. 138,950

the relation between the roughing tool and one plow;

Fig. 4 is a View, partly in front elevation and partly in vertical section, of the roughing mechanism and the channel lip support;

Fig. 5 is a plan View taken on the section line V-V of Fig. 2;

Fig. 6 is a detail view of the roughing brush;

Fig. 7 is a view, in front elevation, of the brush sharpening mechanism;

Figs. 8 and 9 are a front elevation and a plan view, respectively, of a modified form of plow oscillating mechanism; and

Fig. 10 is a detail view showing the manner in which the work is presented to the machine.

Referring to Fig. 1, the illustrated machine is provided with a base l2 containing bearings H for a shaft 16 to which is secured a pulley l 8 driven from any suitable source of power. Also secured to the shaft i6 is a pulley 29 connected by a belt 22 to a pulley 24 afiixed to a countershaft 26. Also aflixed to the countershaft 25 is a driving pulley 28 which is connected by a belt 38, passing around idle pulleys 32, to a driven pulley 34 upon a roughing tool spindle 36.

The spindle 36 (see Fig. 4) is hollow and is mounted to run in ball bearings 38, 4B which are seated in the upper and lower ends respectively of a normally stationary head 42 carried by a horizontal, cylindrical tube 44 which is clamped in the upper section 46 of the frame of the machine.

The roughing tool, which is best illustrated in Figs. 4 and 6, comprises a bundle of wire bristles 48 which are confined closely in a metal tube 50. The tool thus consists of a wire brush the lower end of which may be ground to the form of a pointed cone, as shown at 52, the tube 58 being ground away as the brush is reground from time to time to sharpen it and preserve its shape. The tube B ll has a snug, sliding fit in a slit bushing 54 which, in turn, is adapted to be inserted in the hollow spindle 36, the lower end of which is formed to provide a chuck 55 which may be tightened upon. the slit lower end portion of the bushing 54, causing the latter to grip and hold the roughing brush after the latter has been adjusted vertically to the desired position.

The vertical angle at the tip of the roughing brush is preferably somewhat acute, as shown, in order that all parts of the periphery of the tool may operate upon both the base and the lip of a sole channel without requiring that the lip be turned back over the tread face of the sole.

In order to hold the channel lip up to the roughing tool I have provided a lip support consisting of a frusto-conical roll 58 which is mounted to rotate freely upon a screw 60 threaded into the end of an adjustable arm 62 mounted to swing about the axis of a pair of pointed screws 64 threaded through lugs 66 projecting from the head 42 (see Figs. 2 and 4). The point of a stop screw 68 threaded through the arm 62 engages a protuberance III upon the head 42 and adjustably limits the approach of the lip supporting roll 58 to the roughing tool.

One end of a link I2 is pivotally connected at I4 to the arm 62 and the other end of said link is pivotally connected at I6 to a lever I8 movable about a stationary pivot 80. A pull spring 82 tends to draw the upper end of the lever I8 toward the right, as seen in Fig. 1, and consequently to move the lip supporting roll 53 toward the roughing tool. The lower end of the lever I8 is engaged by the upper arm of a bell crank lever 84, the lower arm of which is connected by a treadle rod to a treadle 88 in such a manner that depression of the treadle will cause the lip support to be moved away from the roughing tool, to permit the channel portion of the shoe sole to be presented thereto.

In order to aid in the presentation of a shoe to the machine and the control of the shoe as it is moved past the roughing tool, a thumb rest is provided. Theshank portion 92 of this thumb rest is secured by a set screw 94 in a bracket 96 fastened to the lower end of the head '42.

The mechanism for raising the channel lip, to open the channel in advance of the roughing tool, comprises a plow 98 which is clamped in a holder IIJI) mounted upon an arm M2. The end of the arm W2 remote from the plow holder Hill is supported very loosely by a stationary stud I614, so that the arm, resting upon the head of the stud, is capable of universal movement to a limited extent and can rock freely in all directions sufficiently to impart the desired movement to the plow.

A pin IIi6,-projecting from the plow holder arm, is adapted to engage in a hole near the end of a spring finger secured by a screw III) to a stationary bracket II2 which is fixed upon the thumb rest shank 92 by a set screw IE4 and,

when the parts are set as shown in Fig. 5, the arm I02 and the plow carried by it are capable of oscillation about an imaginary line, or axis, passing through the pin I06 and the stud I04. When it is not desired to use the channel opening plow the spring finger I08 is pushed off the pin IE6, whereupon the plow may be instantly swung around the stud I04 to an inoperative position, out of the way as shown in dotted lines in Fig. 5.

The oscillation of the plow is effected by a cam III; which is screwed upon the spindle 36, as best seen in Fig. l. A cam roll I I8 upon the plow holder arm I02 engages in the cam I I6 and causes the plow to perform a complete oscillation during .each revolution of the said spindle.

is transmitted by a connecting rod I36 to an arcuate slide I 33. A channel lip raising plow I41] is rigidly secured to the slide I38 and partakes of the movement of the latter. The slide I38 is movable upon a semi-circular guide I42 the center of which is substantially at the point or free end of the plow so that the plow oscillates about its free end as a center. The guide I42 has a shank portion I44 which is secured by a screw I46 to the frame I32, to provide a rigid support for the guide.

An arm I48, integral with the frame I30, is supported by the stationary pin 34 and the frame is provided with a pin I50 for engagement with the spring finger W8 as in the first described form of the invention, except that the arm I48 is fitted closely upon the pin I I14 so that the frame I30 cannot rock, but can be swung aside out of the way when the spring finger is disengaged from it.

In order to form the .tip of the roughing tool 52 to the desired angle and to resharpen it from time to time as it becomes dull or deformed, a grinding attachment is provided, as shown in Figs. 1, 2 and 7. Supported by a bracket I52 at i the right-hand side of the machine frame is a bearing I54 in which runs a shaft I56 carrying a pulley I58 which is driven by a belt IEO from a pulley I62 upon the countershaft 2B. The pulley I62 is adapted to be connected to and disconnected from the countershaft by a clutch controlled by a knob I64 (see Fig. 1).

The left-hand end of the shaft I56 runs in a bushing I65 mounted in a sleeve I68 (Fig. '7) which is both rotatable and longitudinally slidable in a stationary bearing III bolted upon the head 42. The end of the sleeve I68 is flanged at In and a pulley I'M pinned to the shaft I56 has an annular retainer I'IS which embraces the flange and prevents axial movement of the pulley relatively to the sleeve but permits the pulley to rotate freely thereon.

Clamped upon the sleeve I68 by screws I78 is an arm ItIl which carries the grinder. In order to facilitate exact adjustment of the grinder toward and from the roughing tool, the sleeve IE8 is surrounded by a compression spring I82 which holds the end of the sleeve against an adjusting screw I34 threaded through a bracket I86 which is bolted to the bearing I'lil, the adjustment, after it has been effected, being maintained by a. locknut I862.

The end portion of the arm I88 is formed to provide an arcuate guide I99, the center of curvature of which is at approximately the tip of the roughing tool 52. Adjustably secured to this guide by a bolt I92 is a grinding wheel carrier I94 in which runs a shaft I96 upon which is mounted an abrasive wheel I98.

Also affixed to the shaft I96 is a pulley 2M driven by a belt 262 which passes around idle pulleys 204 and the driving pulley I14 upon the shaft I56. The pulleys 2M and 2114 are covered by a belt guard 20% upon which is a handle 2% by means of which the grinding apparatus ifiay be swung into and out of operative position.

By adjusting the carrier I94 along the guide I90 the tip angle of the roughing tool may be changed, if desired, to conform to the beveled end 2 II of a gage 2 I2 which is hinged at 2 I4 to an arm 2H5 mounted to swing around a stationary post 2I8, so that when the'gage is not in use it may be folded over and swung aside out of the way.

In operation, the lip supporting roll 58 is moved away from the roughing tool by depressing the treadle 8B and the shoe is presented to the machine with the plow 98 between the lip and the channel base. The treadle being released, the lip will be supported against the action of the roughing tool by the roll 58 and the shoe will be moved by the operator in the direction indicated by the arrow A in Fig. 10, the oscillating plow raising the channel lip ahead of the roughing tool sufiiciently to permit the latter to operate simultaneously upon both the lip and the channel base from one end of the channel to the other.

Having described the invention, what is claimed as new and desired to be secured by Letters Patent is:

1. A machine for operating upon channeled soles, comprising a roughing tool adapted to perate in the channel of a sole, means for opening the channel in advance of said roughing tool, a pivotal mounting about which the channel opening means may be swung into or away from operating relation to the roughing tool, and an instantly manually releasable retainer for holding said channel opening means in operating position.

2. A machine for operating upon channeled soles, comprising a roughing tool adapted to operate in the channel of a sole, and an oscillatory plow positioned in advance of said roughing tool to open the channel.

3. A machine for operating upon channeled soles, comprising a roughing tool adapted to operate in the channel of a sole, a channel opening plow positioned in advance of said roughing tool and having a free end adapted to extend into the channel, and means for oscillating said channel opening plow about said free end as a center to open the channel.

4. A machine for roughing sole channels, comprising a roughing tool adapted to operate in the channel of a sole, an oscillatory channel opening plow positioned in advance of said roughing tool and having a free end adapted to extend into the channel, and means for oscillating said plow transversely to the channel.

5. A machine for roughing channels and channel lips on shoe soles, comprising a pointed, conical roughing tool adapted to be received Within a channel, and means for rotating said tool about its conical axis, whereby the periphery of the tool will engage simultaneously the base of the channel and the inner surface of the lip.

6. YA machine for roughing channels and channel lips on shoe soles, comprising a pointed, conical roughing tool adapted to be so received within a channel that all parts of the periphery of the tool will operate upon both the base and the lip of the channel, and a channel lip support so related to said tool that the tool will operate simultaneously upon both the base and lip of a channel when the lip is positioned against the support.

7. A roughing machine comprising achannel lip support in combination with a wire brush in the form of a pointed cone with its point adjacent to said lip support, and means for rotating said brush about the axis of the cone.

8. A roughing machine comprising a channel lip support in combination with a tubular ro tary spindle, and a bundle of wire bristles secured within said spindle and extending from an end thereof, the extending portion of said bundle being in the shape of a cone coaxial with said spindle.

CHARLES G. BROSTROM. 

